Rainbow-electronics ATmega32L Manual de usuario descargar pdf (Pagina 210)

210

ATmega32(L)

2503C–AVR–10/02

• Integral Non-linearity (INL): After adjusting for offset and gain error, the INL is the

maximum deviation of an actual transition compared to an ideal transition for any

code. Ideal value: 0 LSB.

Figure 109. Integral Non-linearity (INL)

• Differential Non-linearity (DNL): The maximum deviation of the actual code width

(the interval between two adjacent transitions) from the ideal code width (1 LSB).

Ideal value: 0 LSB.

Figure 110. Differential Non-linearity (DNL)

• Quantization Error: Due to the quantization of the input voltage into a finite number

of codes, a range of input voltages (1 LSB wide) will code to the same value. Always

±0.5 LSB.

• Absolute Accuracy: The maximum deviation of an actual (unadjusted) transition

compared to an ideal transition for any code. This is the compound effect of Offset,

Gain Error, Differential Error, Non-linearity, and Quantization Error. Ideal value: ±0.5

LSB.

Output Code

REF

Input Voltage

Ideal ADC

Actual ADC

INL

Output Code

0x3FF

0x000

REF

Input Voltage

DNL

1 LSB

1 2 ... 205 206 207 208 209 210 211 212 213 214 215 ... 312 313

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Rainbow-electronics ATmega32L Manual de usuario Pagina 210